/*
    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>

    This program is free software; you -can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "rgba_descriptor.h"
#include "wave_pcm_descriptor.h"
#include "exceptions.h"

using boost::shared_ptr;
using namespace dcp;

EssenceDescriptor::EssenceDescriptor (cxml::ConstNodePtr node)
	: Object (node->string_child ("Id"))
{

}

shared_ptr<EssenceDescriptor>
EssenceDescriptor::create (cxml::ConstNodePtr node)
{
	if (node->optional_node_child("RGBADescriptor")) {
		return shared_ptr<EssenceDescriptor> (new RGBADescriptor (node));
	} else if (node->optional_node_child("WAVEPCMDescriptor")) {
		return shared_ptr<EssenceDescriptor> (new WAVEPCMDescriptor (node));
	}

	throw PackageReadError ("unrecognised essence descriptor");
	return shared_ptr<EssenceDescriptor> ();
}